The record value in the following format:FIELD_NAME=FIELD_VALUEFIELD_NAME=FIELD_VALUE ...

$marker or $marker()

Expands to marker for the item matching selection only

$_FILED_NAME or $_FIELD_NAME()

Please be noted that you need to put _ (underscore) in front of a field name. $_FIELD_NAME$ yields the value of the specified field. If the specified field does not exist in the record, it returns the null string ("").

?FIELD_NAME?IF_FIELD_HAS_VALUE?

If the specified field has value and it's neither 0 nor the null string (""), it's evaluated as IF_FIELD_HAS_VALUE. Otherwise, it's evaluated as the null string. This is like q/.../ in Perl. A non-word character following ?FIELD_NAME becomes the terminator; i.e. you can write: ?FIELD_NAME:IF_TRUE: Specifically, the following characters can be used as the delimiter: ! # % ' / : ? @ ^ ` | ~= is excluded because it clashes with a parameter specification in a URL (?name=value).

?!FIELD_NAME?IF_FIELD_HAS_NO_VALUE?

Similar to above but it's opposite. If the field has value, it's evaluated as the null string. Otherwise, it's evaluated as IF_FIELD_HAS_NO_VALUE.

$question

Replaced with ? after the ?FIEL_DNAME and ?!FIELD_ANME constructs are processed.

"| $_ | $__ |"

selection="..."

The record ID to be regarded as the selected. It affects how $marker in the format is evaluated.

none

marker="..."

Text for $marker in the format if the item matches selection

"selected"

filter="..."

The regular expression of record IDs to filter records. Matching is case-insensitive

none

exclude="..."

Comma separated list of record IDs to be excluded. You can use regular expression. If you specify Trash\d*, then Trash, Trash1, Trash2, ... are exluded but LightTrash and TrashBag are not excluded